The Sig Sauer M400 Forge is a semi-automatic AR-platform rifle configured in 5.56 NATO with a 16-inch barrel and a ROMEO‑MSR Gen II optic. This configuration ships with a 10-round magazine and is built with forged components and a Forge Black finish. The rifle includes an M-LOK handguard for modular accessory mounting and is presented in a California-compliant configuration.
Key Specifications
- Chambered for 5.56 NATO for compatibility with standard NATO-spec cartridges.
- Operates as a Semi-Auto action for standard AR-platform handling.
- Equipped with a 16 inches barrel length for a balance of maneuverability and velocity.
- Built with a 1:7 twist rate suitable for stabilizing a wide range of projectile weights.
- Features a Cold Hammer Forged Steel barrel construction as specified in the sources.
- Includes a ROMEO-MSR Gen II red dot optic for immediate sighting capability.
- Outfitted with an M-LOK handguard for modular accessory mounting.
- Ships with a 10-round magazine in the California-compliant configuration.
- Specified weight is approximately 6.20 lbs in provided attributes.
- Finished in Forge Black for a subdued, non-reflective appearance.
The M400 Forge is suitable for range use, training, and general AR-platform handling where a compact optic-equipped configuration and California-compliant magazine capacity are required. Its M-LOK interface supports accessory customization while the included ROMEO-MSR Gen II provides a ready optic solution.
With a cold hammer-forged barrel, established AR ergonomics, and an out-of-the-box optic, this M400 Forge configuration delivers a practical, serviceable package for informed shooters who prioritize reliable components and straightforward functionality. The combination of the M-LOK interface, durable barrel construction, and integrated optic makes it a ready platform for sighting-in, training, and routine range sessions.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
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